Function arg_combinators::opt_default_by [−][src]
pub fn opt_default_by<T, E, F>(
short: &str,
long: &str,
doc: &str,
hint: &str,
default: T,
parse: F
) -> impl Arg<Item = T> where
E: Clone + Debug + Display,
T: Clone + FromStr + Display,
F: Fn(String) -> Result<T, E>,